A Method to Demonstrate Several Basic Contents of Electric Body

Abstract

A demonstration method of several basic contents of a charged body, mainly consisting of a DC power supply, a high-voltage DC power supply, an electrode brush for a high-voltage DC power supply, a motor, a hollow conductor ball, a transparent insulating box, a magnetic silicon steel cone, an aluminum foil cylinder, and a transparent insulating box. Composed of plastic cylinder, aluminum foil and small magnetic needle, it is characterized in that: the rotating shaft of the motor is fixed with a hard insulating rod, the insulating rod is fixed with the conductor hollow ball, the axis extension line of the motor shaft passes through the center of the conductor hollow ball; the motor, DC Both the power supply and the high-voltage DC power supply are fixed at the bottom of the transparent insulating box. The DC power switch K1 has the functions of adjustable speed and steering switch. The magnetic silicon steel cone is a cone composed of magnetic silicon steel sheets, which can demonstrate the electrostatic induction and flow of charged objects. The content such as the magnetic effect of the current is easy to make and the effect is obvious. The application in teaching will add more educational functions.

Description

technical field [0001] This patent relates to a demonstration device and method for exploring several basic contents of charged bodies, which belongs to the field of physical experiments. Background technique [0002] In college physics teaching, electrostatic induction, electrostatic shielding, and the magnetic effect and application of steady current are important contents and teaching difficulties. Students usually have difficulty in understanding electrostatic induction and shielding phenomena. The existing demonstration content is single, such as the charged spherical surface. The understanding of the electric field and the effect of the charged spherical surface on the conductor is still limited to the electrostatic range; the magnetic field of the steady current is limited to the experimental phenomenon of the conduction current, and the magnetic effect of the current is in the conceptual memory, which is difficult to understand and experience. Application Sometimes s...

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Problems solved by technology

[0002] In college physics teaching, electrostatic induction, electrostatic shielding, and the magnetic effect and application of steady current are important contents and teaching difficulties. Students usually have difficulty in understanding electrostatic induction and shielding phenomena. The existing demonstration content is single, such as the charged spherical surface. The understanding of the electric field and the effect of the charged spherical surface on the conductor is still limited to the electrostatic range; the magnetic field of the steady current is limited to the experimental phenomenon of the conduction current, and the magnetic effect of the current is in the conceptual memory, which is difficult to understand and experience. Application Sometimes students copy the formulas, and it is difficult to solve practical problems. Students often ask that the charge is moving, and there is only the force of static charges (electrostatic field)? Only magnetic field (action)? Or do both functions exist at the same time? How to understand and experience the effects of electrostatic field, stable magnetic field and charged conductor movement, lack of corresponding experimental device demonstration and exploration, in order to cultivate students' innovative spirit and practical ability, how teachers consider, design, research and solve this related problem, this book Patents will solve this problem

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